空化效應是決定清洗效果的主要因素，而超聲波頻率則直接影響著空化效果，一般產生空化效應的超聲波頻率以20KHz-80KHz為適合。

Cavitation effect is the main factor to determine the cleaning effect, and the ultrasonic frequency directly affects the cavitation effect. Generally, the ultrasonic frequency for cavitation effect is 20khz-80khz.

頻率與液體中氣泡的直徑成反比，與滲透性成正比。頻率越高，波長較短，空泡直徑小，爆炸壓力低，滲透性好，適合于表面光滑度高、精細工件的清洗。另外，頻率也不能過高，否則波長減短，空化作用反而會減弱，從而降低清洗效率。

The frequency is inversely proportional to the diameter of the bubble in the liquid and directly proportional to the permeability. The higher the frequency is, the shorter the wavelength is, the smaller the bubble diameter is, the lower the explosion pressure is, and the better the permeability is. In addition, the frequency should not be too high, otherwise the wavelength will be shortened, the cavitation effect will be weakened, thus reducing the cleaning efficiency.

反之，超聲波頻率越低，在液體中產生空化越容易，產生的力度大，作用也越強，適用于表面粗糙且較難清洗的污垢。超聲波頻率還影響著工作時所產生的高頻噪聲，頻率越低，噪聲越大，一般在滿足清洗效果的前提下，盡量選擇較高的頻率。

On the contrary, the lower the ultrasonic frequency is, the easier it is to produce cavitation in the liquid, and the greater the force is, and the stronger the effect is. It is suitable for the dirt with rough surface and difficult to clean. The lower the frequency, the greater the noise. Generally, on the premise of meeting the cleaning effect, choose the higher frequency as far as possible.

基于以上原理：

Based on the above principles:

低頻17K-23K：適用于清洗污垢較重或者比較難清洗的工件，且氣泡爆破沖擊力對工件表面不會造成傷害時，應選擇低頻超聲波清洗，例如：汽配、紡織等。

Low frequency 17k-23k: suitable for cleaning the workpiece with heavy dirt or difficult to clean, and when the impact force of bubble explosion will not cause damage to the workpiece surface, low frequency ultrasonic cleaning should be selected, such as auto parts, textile, etc.

中頻25K-28K：適用于清洗污垢稍重或者清洗易適中，且氣泡爆破沖擊力對工件表面不會造成傷害時，應選擇中頻超聲波清洗，例如：五金機械、電鍍行業等。

Medium frequency 25k-28k: suitable for cleaning with heavy dirt or easy cleaning, and the impact of bubble explosion will not cause damage to the workpiece surface, medium frequency ultrasonic cleaning should be selected, such as: Hardware machinery, electroplating industry, etc.

中高頻33K-60K：適用于清洗污垢較輕或清洗較容易，且氣泡爆破沖擊力對工件表面不會造成傷害時，應選擇中高頻超聲波清洗，例如：光學玻璃、電子元器件等。

Medium and high frequency 33k-60k: suitable for cleaning when the dirt is light or easy to clean, and the impact force of bubble explosion will not cause damage to the workpiece surface, medium and high frequency ultrasonic cleaning should be selected, such as optical glass, electronic components, etc.

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